160 HyPrecision 50S/60S/75S Operator Manual 808690
7 – Troubleshooting
Troubleshooting
The intensifier strokes but there is not enough pressure at the cutting head
Take these actions:
Replace the water filters. Refer to page 91 for instructions.
Repair or replace the thimble filter for the on/off valve.
Make sure that there is not an obstruction in the high-pressure tubing.
If an output adapter is hot, check the high-pressure poppet and the high-pressure poppet seat.
If the bleed-down valve is hot or if water is coming out of the pump drain line, repair or replace the
bleed-down valve.
Make sure that the number of orifices and their sizes are sufficient for the pump’s output. Refer to the
Troubleshooting section, which begins on page 157.
The hydraulic piston seals are worn. Contact a Hypertherm Technical Service Associate for assistance.
If a high-pressure cylinder is hot, disassemble it and look for flaws, deterioration, erosion marks, or cracks in
the parts, including the check valve and piston seal.
The intensifier is overstroking
The intensifier usually strokes smoothly to the left and to the right at the same speed. An overstroke fault occurs
when the hydraulic piston travels faster in 1 or both directions than the waterjet pump can support.
The intensifier usually strokes faster during startup and when changing from pierce-pressure mode to
cut-pressure mode.
The overstroke alarm is caused by 3 conditions: overstroking to the right, overstroking to the left, or overstroking
in both directions. If the overstroke alarm is on, take these actions.
1. Turn OFF the cutting head.
2. Touch the symbol on the operator interface to put the pump in running mode.
3. Turn ON the cutting head. The intensifier starts stroking.
4. Put the pump in cut-pressure mode.
5. Monitor the intensifier stroke rate indicator on the operator interface.
Fault/warning Stack light Result
Intensifier overstroke to the right
Red
The intensifier turns off.
The pump runs in cooling mode.
Intensifier overstroke to the left
Intensifier overstroke in both directions
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